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darz5150
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# Posted: 10 Jul 2025 12:16am
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It seems I have been replacing a few light bulbs in the past few months.
IIRC correctly. All were 40 or 50k hour lifespan bulbs.
I don't remember leaving any of the lights on for 4 or 5 years. Maybe it's just my math. 
Has anyone got 50k hours out of a light bulb?
Here's my math.
50,000 hrs ÷ 24 hrs =2083 days
2083 days ÷ 365 = 5.7 years.
If I am right or wrong, I need to order more bulbs.
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Brettny
Member
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# Posted: 10 Jul 2025 06:44am
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Light bulb math is like paper towel math. 12=24 and 6=16.
No you wont get the hours they state. I'm replacing some LED bulbs that are less than 8yrs old. I started notice this and actualy started putting dates on the bulbs.
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gcrank1
Member
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# Posted: 10 Jul 2025 08:47am
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I buy the cheap packs and dont worry about it 
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paulz
Member
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# Posted: 10 Jul 2025 10:06am
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Wait, LEDs go bad? Dang, just got over incandescent. 
Here’s my little experiment. These little buck store solar LEDs work great, several on my deck go on every night but after a few hours quit until sun recharge next day. I put one next to my dial cabin clock in the cabin to see it all night but also didn’t last. So I took it apart… the battery they come with is this little 1.2v NiCd. I replaced it with an 18650 3.7v Li-ion I had lying around. It works fine but also wore down, down to 2.5v this morning. I guess the charging chip it uses limits the solar charge. Still playing around..
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